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Displaying results 1-11 of 11
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Paradox

The Nine Greatest Enigmas in Physics

Written by Jim Al-Khalili

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Bet You Can't Do This! Crosswords

75 Really, Really, Really Hard Puzzles

Written by John Samson

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Bet You Can't Do This Sudoku!

110 Really, Really, Really Hard Puzzles

Written by Anthony Immanuvel

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The Train Your Brain Workout

156 Puzzle Challenges for a Stronger Mind

Written by Peter De Schepper and Frank Coussement

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Tic Tac Tome

The Autonomous Tic Tac Toe Playing Book

Written by Willy Yonkers